Clementina j



(No Model.) v

G. J. M. HAYNA.

AIR FEEDING GRATE BAR.

No. 276,178. Patented A r. 24, 1883.

I fnvnarl v ewm/aam NITED STATES GLEMENTINA J. M. HAYNA, OF ST. LOUIS,MISSOURI.

AIR-FEEDING GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 276,178, dated April24, 1883.

Application filed December 14, 1882. (No model.) I

To all whom it may concern:

Be it known that I, GLEMENTINA J. M. HAYNA, of St. Louis, Missouri, havemade a new and useful Improvement in Air-Feeding Grate-Bars forPreventing Waste in Fuel- Burning Furnaces, of which the following is afull, clear, and exact description, reference bein g had to the annexeddrawings, making part of this specification, in which Figure 1 is avertical longitudinal section taken on the line 1 1 of Fig. 2 ofafurnace havin g the improvement in question; Fig. 2, a verticaltransverse section taken on the line 2 2 of Fig. 1; and Figs. 3 and 4,details upon an enlarged scale, Fig. 3 being a horizontal section takenon the line 3 3 of Fig. 4, and Fig. 4 a vertical section taken on theline 4 4 of Fig. 3.

The same letters of reference denote'the same parts.

The present invention is adapted to'a great variety of furnaces,including stoves. By means of it the fuel and smoke are thoroughlyconsumed.

A represents a furnace in which the improvement is embodied. It is shownin connection with a steam-boiler, B.

0 represents one of the doors of the furnace.

The fuel rests upon a series of peculiarlyconstructed bars, D D D D D.These bars take the place of the ordinary grate-bars in a fuel-burningfurnace, extending from the front of the furnace toward the rear endthereof. Each of these bars in cross-section is constructedsubstantially as showninFigs. 1, 2, 4-- that is, being arched, the archpreferably being quite deep. At the farther end, (I, of each of the barsD D D the bar is extended upward in the form of pipes d, Figs. 1,2, 3,4.The bars D Dat each side, respectively, of the furnace are similarlyarched underneath, but in place of having a single pipe at the fartherend of the bar they have a series of upright tubes, 61 d 6?, throughoutthe length of the bar. The bars D D D throughout their length havenumberless perforations, (1 Figs. l,3,4that is, as many as ispracticable for the escape of the air upward from the air-passages (Zbeneath the bars. The tubular extensions d d have at their upper ends,respectively, outlets d Figs. 1,2, 4. The eifectof this constructionis'to provide air-passages d d underneath each bar D D D D,respectively, wherein air can be I received and heated by means of theburning fuel upon the upper side of the bars. The air also enters theupright passages d W, and is heated therein. From the passages 01 d dthe heated air escapes through the perforations d d upward all over thebottom of the furnace and along the sides and across the rear and aportion of the front end of the furnace, the air being delivered intothe furnace-chamber in such quantity and heated to such a degree as toenable the fuel and the smoke to be much more thoroughly consumed thanin the ordinary furnace. The bars D D D D D are laterall y placedclosely together andsubstantially as shown in Fig. 2. The bosses (Z d,Figs. 3, 4,.serve to keep the bars a slight distance apart, the aimbeing to separate the bars to that extent only as may be necessitatedfor the downward passage into the ash-pit of such ashes as may be formedin thefurnace. It is not intended to agitate the grate-bars or the fireforthe purpose of discharging the ashes forcibly from above the bars,but rather to let the ashes of itself find its way downward into theash-pit.

It is desirable to have the upright tubes (1 61 extended entirely aroundthe furnace-chamher; but where fuel isiutroduced laterally into thefurnace-chamber, as through the furnacedoor 0 in the present case, theupright tubes are necessarily omitted at the points where fuel isintroduced.

- I do not desire, in the construction of the tubes (1 61 to berestricted in horizontal crosssection to any special form. Thegeneral'shape of the bars D D D D D, as a set, conforms to the contourof the furnace-chamber in which the bars are placed-that is,for use in asquare furnace, such as here shown, the bars are extended forward andbackward in the furnacechamber, and the upright tubes (1 d are in arectangular form, corresponding to the shape of the furnace-chamber; butin a differentlyshaped furnace-chamber-for instance, one of a circularshape-the bars are extended horizontally suitably to meet the walls ofthe chamber, and the passages cl 01 then assume a circular form, for theessence of the invention is so constructing the bars D D, &c., as toform a series of air-passages horizontally beneath the fire, as seen at(P, Figs. 1, 2, 4, and a series of upright air-passages surrounding thefire, as seen at d d, Figs. 1, 2, 3, 4, and so that the heated air shallescape both upward into the burning fuel and also laterally over thefire. By reason of the apertures from the passages d d being at thesides of such passages as shown, the airescaping therefrom into the fireoperates to drive the escaping heated current of'air and smoke backwardinto the hotter portion of the fire, serving thereby to consume thesmoke.

I claim- 1. A furnace, A, having the bars D D D D D, said bars beingarched to form the passages d perforated at (F, provided'with the bossesd, and having the perforated tubular extensions 01 d, as and for thepurpose described.

2. A furnace, A, having the bars D D D D D, said bars being arched toform the passages d perforated at d for the air to pass 20 upward, andprovided with the bosses cl, as and for the purpose described.

3. A furnace, A, having the bars D D D D D, said bars being arched toform the airpassages 61 and perforated at (1, and having 25 theperforated tubular extensions d d, as and for the purpose set forth.

4. A furnace, A, the fuel in which is supported upon the bars D D D D D,said bars being shaped to form the air-passages 01 and 0 beingperforated at (1 as and for the purpose described. 7

Witness my hand.

OLEMENTINA J. M. HAYNA.

Witnesses:

O. D. MOODY, ALBERT G. FISH.

